Experimental investigations on mechanical and wear behavior of waste marble dust and coconut fiber reinforced hybrid bio composites

Abstract

Polymer composites including natural fibre and waste particulate filler have been increasingly popular in recent decades because of their environmental friendliness, biodegradability, and lower cost. So the current research is focused on generating, characterising, and evaluating the dry sliding wear response of hybrid composites containing epoxy resin matrix and marble dust (industrial/construction waste) with coconut fibres as reinforcement. The epoxy composites were prepared by using waste marble dust powder (filler) at varied percentages (4, 8, 12, and 16 wt%) and varying quantities of coconut fibre (reinforcement). The test specimens were cut in accordance with ASTM criteria for composite samples prepared by hand lay-up. According to the ASTM G99-05, a disc method with a 3 m/s velocity and loads of 5, 10, 15, and 20 N is used to conduct dry sliding wear experiments on the composite samples. Filled composites have a lower wear rate than those that aren't filled, however adding more filler than 12 wt% increases wear marginally. Analysis of test outcomes suggests that wear rate is significantly affected by filler content in the composite, followed by load. The composite with 12 % waste marble dust and 16 % coconut fibre volume fraction had the highest tensile, flexural and impact strength of 34.27 MPa, 37.23 MPa and 16.32 kJ/m2 correspondingly.